Raja said that in his opinion this was the
worst Michael Swanwick's novel he's read--while it's better than
average, and an enjoyable time travel romp with dinosaurs, it's
not as ambitious or as powerful as Vacuum Flowers
or Stations of
the Tide. Also, Swanwick's short story "Scherzo
with Tyrannosaur" covers most of the same territory in only
14 pages!